package com.test;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.text.NumberFormat;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class Digg extends HttpServlet {
	private static Connection con = null;
	private static Statement stmt = null;

	/**
	 * Constructor of the object.
	 */
	public Digg() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		this.doPost(request, response);
	}

	/**
	 * The doPost method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to
	 * post.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		request.setCharacterEncoding("utf8");
		response.setCharacterEncoding("utf8");
        String action = request.getParameter("action");
        String digtype = request.getParameter("digtype");
        if(action.equals("digs")){
        	try {
        		response.getWriter().write(dig(digtype));
				
			} catch (Exception e) {
				e.printStackTrace();
			}
        }else if(action.equals("getdigshtml")){
        	try {
        		response.getWriter().write(getDigHtml());
			} catch (Exception e) {
				e.printStackTrace();
			}
        }
	}
   private String dig(String digtype)throws Exception{
	   String sql ="";
	   if(digtype.equals("digs")){
		   sql ="update dig set digs=digs+1 where id =1";
	   }else{
		   sql ="update dig set undigs=undigs+1 where id =1";
	   }
	   int num =stmt.executeUpdate(sql);
	   if(num>0){
		   return "3";
	   }
	   return "1";
   }
   public static void main(String[] args){ 
	   NumberFormat nf = NumberFormat.getPercentInstance(); 
	   nf.setMaximumIntegerDigits(4); 
	    nf.setMaximumFractionDigits(6); 
	   double d = (double)1/(double)7; 
	   System.out.println(nf.format(d)); 
	   } 
   private String getDigHtml()throws Exception{
	   NumberFormat nf = NumberFormat.getPercentInstance(); 
	   nf.setMaximumIntegerDigits(3); 
	   nf.setMaximumFractionDigits(2); 
	   
	   String sql ="select * from dig where id=1";
	   ResultSet res = stmt.executeQuery(sql);
	   double digSum = 0 ;
	   double unDigSum =0 ;
	   double digSumAll = 0;
	   String digPer = "0%";
	   String unDigPer = "0%";
	   while(res.next()){
		   digSum = res.getInt("digs");
		   unDigSum = res.getInt("undigs");
	   }
	   digSumAll = digSum + unDigSum;
	   if(digSumAll !=0 ){
		   digPer = nf.format(digSum/digSumAll);
		   unDigPer = nf.format(unDigSum/digSumAll);
	   }
	   
	   String str="<div class='good'>";
			str+="<a href=JavaScript:isdigs('digs') >";
			str+="<p>很好</p><div class='bar'><div id='g_img' style='width:"+digPer+"'></div></div>";
			str+="<span class='num'>"+digPer+"("+digSum+")</span>";
			str+="</a></div><div class='bad'>";
			str+="<a href=JavaScript:isdigs('undigs') >";
			str+="<p>很差</p><div class='bar'><div id='b_img' style='width:"+unDigPer+"'></div></div>";
			str+="<span class='num'>"+unDigPer+"("+unDigSum+")</span>";
			str+="</a></div>";
	
	   return str;
	   
   }
	/**
	 * Initialization of the servlet. <br>
	 * 
	 * @throws ServletException
	 *             if an error occurs
	 */
	public void init() throws ServletException {
		try {
			Class.forName("com.mysql.jdbc.Driver");
			con = DriverManager.getConnection(
					"jdbc:mysql://127.0.0.1:3306/dig", "root", "root");
			stmt = con.createStatement();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

	}

	public void closeCon() {
		try {
			stmt.close();
			con.close();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

	}
}